/*
 *  Copyright 2009 Advanced Industrial Science and Technology (AIST).
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/*! \file
 *  \brief
 */
#pragma once

#include <thrust/mpl/bool.hpp>

namespace thrust {

  // directed category
  struct undirectedS {
    enum { is_directed =false, is_bidir =false};
    typedef thrust::mpl::false_ is_directed_t;
    typedef thrust::mpl::false_ is_bidir_t;
  };

  struct directedS {
    enum { is_directed =true, is_bidir =false};
    typedef thrust::mpl::true_  is_directed_t;
    typedef thrust::mpl::false_ is_bidir_t;
  };

  struct bidirectionalS {
    enum { is_directed =true, is_bidir =true};
    typedef thrust::mpl::true_ is_directed_t;
    typedef thrust::mpl::true_ is_bidir_t;
  };

  // parallel edge category
  struct allow_parallelS {
    enum { is_parallel =true};
    typedef thrust::mpl::true_ is_parallel_t;
  };
  
  struct disallow_parallelS {
    enum { is_parallel =false};
    typedef thrust::mpl::false_ is_parallel_t;
  };

} // namespace thrust
